Help! Confusing relationship & unsure what to do now.

Someone help.
Me and my boyfriend dated for just over two years, in that time I moved in with him and his family for the past year and became part of the family, I went through a lot of family problems of my own during that time. In the last months me and my boyfriend started to become unsure of our relationship, we would fight and not know where each other stood until one day I suggested that we should breakup if things aren't going to change (something I never wanted to do) my boyfriend then said breaking up was a good idea. I broke down and fought as hard as I could to keep the relationship together but he wanted to end it.. I lived at his house for a few weeks after that as I had no where else to live, I then moved out and on our last night together his parents cried, I cried then we both went to bed and he cried aswell. Through the time when I was still living their we acted like a couple, we kissed, cuddled, had sex, went on little dates. This confused me. I moved out and we still continued to text each other, regularly we would end up at the same friends houses on the weekend and then end up going home together, it was on and off for a while, I was always I initiating for us to try and make it work, and he always agreed to try, we did this for 3 months, he would try then say he doesn't want it anymore and we would stop talking for a week then somehow we would start seeing each other again. After 3 months of not officially being together he finally said "I love you" and said that we were back together. I was so happy! I moved back in and We were together for a month and I felt like it was going good, we booked a holiday together, we're regularly telling each other we love each other, cuddling and just getting along. After a rough week of it being that time of month for me I was an emotion wreck, I would lash out for no reason and one day initiated a fight that lead to him saying he can't do this anymore, we went home that night and talked, he said he he doesn't want this anymore, he loves me half the time and sees me in his future and then the other half the time he doesn't love me or want to spend the rest of his life with me, we decided on staying together and trying to work through it but regularly he says that he doesn't want to do this anymore and that his mind isn't going to change. He blames me for this dragging on as much as it has, when he is also to blame, he messages me or asks me to come over when we aren't together, he is amazing when we are together then suddenly out of no where doesn't want the relationship anymore. I know this sounds stupid, but I honestly think he is the one, every time we aren't together and we see each other we are automatically attracted to one another. I want this to work more than anything, all I want is for us to both be happy together but I don't know how to make him happy. I don't believe him when he says he doesn't love me because of everything we've gone through and the things he does. If he really wanted to he could leave at any second, he doesn't have to keep trying.
Please help me ..